Salivary testosterone and body composition among Ariaal males
Salivary testosterone and body composition among Ariaal males
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DOI：
10.1002/ajhb.10203
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发表时间：
2003-09-01
影响因子：
2.9
通讯作者：
Lipson, SF
中科院分区：
文献类型：
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作者：
Campbell, B;O'Rourke, MT;Lipson, SF
为了确定睾丸激素是否与自给自足社会中男性的急性和/或慢性营养状况呈负相关，对肯尼亚北部游牧和定居的阿里亚尔牧民的唾液样本和人体测量进行了比较。56名游牧男子和62名面临干旱条件的定居男子被抽样调查，估计年龄在22-96岁之间。测量指标包括身高、体重、四次皮褶厚度和生物电阻抗(BIA)测量的体脂百分比。唾液样本用放射免疫法测定睾酮。总体而言，体重指数(BMI)(Avg.=17.8+/-6.0 kg/m(2)和唾液睾酮(T)水平(avg.AM值=176.8+/-74.8pmol/L)与西方人群相比偏低。对这两个亚群的比较显示，在身高、体重、BMI或瘦体重方面没有显著差异。然而，游牧雄性表现出明显较小的皮褶。晚上，而不是早上，唾液T值在不同亚群之间存在差异。与年龄相关的身体成分变化包括BMI随着年龄的增长而显著下降，这与身体脂肪的减少有关，但瘦体重几乎没有变化。与年龄相关的BMI和体脂百分比的下降在游牧男性中更为明显。AM唾液T值随着年龄的增长而下降；同样，游牧男性的下降幅度明显更大。PM唾液T水平随年龄增长无明显下降。当控制居住地和年龄时，唾液T与体脂百分比和腰臀比呈正相关，但与瘦体重无关。根据躯体分配的生活史理论，这些结果提供了证据，表明在能量紧张的生存人口中，唾液T与男性的急性营养状况有关。(C)2003年Wiley-Liss，Inc.
To determine if testosterone is negatively related to acute and/or chronic nutritional status among men in a subsistence society, saliva samples and anthropometric measures were compared among nomadic and settled Ariaal pastoralists of northern Kenya. Fifty-six nomadic men and 62 settled men facing drought conditions, estimated ages 22-96 years, were sampled. Measures included height, weight, four skinfolds, and %body fat by bioelectric impedance (BIA). Saliva samples were assayed for testosterone using radioimmunoassay. Overall, both body mass index (BMI) (avg. = 17.8 +/- 6.0 kg/m(2)) and salivary testosterone (T) levels (avg. Am value = 176.8 +/- 74.8 pmol/l) were low compared to values from Western populations. Comparison of the two subpopulations revealed no significant difference in height, weight, BMI, or lean body mass. However, nomadic males exhibited significantly smaller skinfolds. Evening, but not morning, salivary T values differed between the subpopulations. Age related changes in body composition included a significant decline in BMI with age, related to loss of body fat, but with little change in lean body mass. Age-related declines in BMI and %body fat were more pronounced among the nomadic males. Am salivary T values declined with age; again, the decline was significantly greater among nomadic males. Pm salivary T levels showed no significant decline with age. When controlled for residence and age, salivary T was positively related to %body fat and WHR ratio, but not lean body mass. These results provide evidence that salivary T is related to acute nutritional status among males in an energetically stressed subsistence population, in accordance with life history theories of somatic allocation. (C) 2003 Wiley-Liss, Inc.